JP3066717B2 - Wire shield structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shield structure of an electric wire configured to obtain the same shielding effect as that obtained by using a shield wire without using a shield wire, and particularly to a control structure such as a control device mounted on an automobile. The present invention relates to a wiring technique suitable for a case where reliable shielding performance is required, cost reduction and improvement in maintainability are required.

[0002]

2. Description of the Related Art Various types of electronic equipment including a CPU are mounted on a current automobile. Naturally, a shielded wire is used for transmitting and receiving high-frequency signals in order to prevent unstable operation of the equipment due to noise. Is done. The electronic device and the wiring including the shield wire are detachably connected by a pair of connectors in consideration of workability at the time of assembly and maintenance.

FIGS. 17 to 19 show an example of a conventional shield line wiring. In the case of a shield structure of this shield line as shown in FIG.
4a is exposed by peeling off the inner insulating coating layer 84b covering it by a predetermined length. In addition, the inner insulating coating layer 8
The braided wire 84c for shield connection (drain short-circuit) covering the upper part 4b is folded back on the outer coating layer 84d cut at a position slightly lower than the inner insulating coating layer 84b. Then, a rubber stopper 86 having a locking projection 86a, a waterproof rubber stopper 85, and a metal connecting member 87 were mounted on the knitted wire 84c and the outer coating layer 84d, and the tip of the shield knitted wire 84 was further exposed. A terminal fixing bracket 81 is fixed on the core wire 84a.

[0004] A connector housing 88 is externally fitted to the terminal fixture 81. This connector housing 88
Are a cylindrical housing main body 89 externally fitted to the terminal fixing bracket 81, a flange 91 externally fitted to the housing main body 89, a cylindrical main body 90a sandwiched between the housing main body 89 and the flange 91, and A metal shell 90 having a flange portion 90b exposed on the front side of the flange 91;
A C-ring 93 is provided for engaging with the terminal fixing member 81 inserted into the housing body 89 to prevent the terminal fixing member 81 from coming off the housing body 89.

The terminal fixing bracket 81 has a female threaded portion 82a for screwing a connection terminal 98 on the device side on the front end face, and a locking groove in which a C-ring 93 is engaged on an outer peripheral portion on the front end side. 82b are formed. The base end face is provided with a core wire insertion hole 83a for inserting the core wire 84a, and after inserting the core wire 84a into the core wire insertion hole 83a,
The outer periphery of the core wire insertion hole 83a is fixed to the core wire 84a by caulking. The connection member 87 is used to shield-connect (drain short-circuit) the knitted wire 84c to the metal case 94 of the electric device via the above-described metal shell 90, and is a tube that is crimped to the main body 90a of the metal shell 90. It has a structure in which a tubular portion and a tubular portion that is crimped to the braided wire 84c are integrally formed.

When the connector housing 88 is fitted over the terminal fixing bracket 81, the rubber packing 85
The gap between the cylindrical portion of the flange 91 extending rearward and the outer coating layer 84d of the shield braid 84 is closed to keep the space between the connector housing 88 and the shield braid 84 watertight. On the other hand, the housing main body 89 of the connector housing 88 has a cylindrical shape whose front end is inserted through an electric wire insertion hole 95 formed in the metal case 94. Seal ring 9 for waterproofing between 89 and wire insertion hole 95
2 is installed. Further, when the flange 91 externally fitted to the housing body 89 is screwed to the metal case 94 by the bolt 100, the flange portion 90 of the metal shell 90
b is formed so as to reliably contact the metal case 94.

[0007] In the above shield structure of the shield wire,
As shown in FIG. 18, a connector housing 88 is attached to a terminal fixing bracket 81 which is crimped to a core wire 84a of a shield braided wire 84.
To the assembled state. Next, as shown in FIG. 19, the distal end of the housing body 89 of the connector housing 88 is inserted into the wire insertion hole 95 of the metal case 94, and the flange 91 is fixed to the metal case 94 with bolts 100. Further, the connection terminal 98 on the device side is provided by the bolt 101.
Is screwed to the distal end of the terminal fixing bracket 81, thereby electrically connecting the core wire 84a of the shield knitted wire 84 and the connection terminal 98 on the device side, and connecting the knitted wire 84c of the shield knitted wire 84 to the metal case 94. The shield connection (drain short-circuit) process and the waterproof process between the shield braided wire 84 and the wire insertion hole 95 are reliably performed.

[0008]

However, in the shield structure of the above-mentioned conventional shield wire, the shield wire 8
It is necessary to perform operations such as stripping the knitted wire 84c and then turning it back. In order to improve the contact between the knitted wire 84c and the connection member 87, the exposed range of the knitted wire 84c must be increased. The structure is complicated and the assembling work is troublesome and the workability is not good.

Further, the shield wire 84 itself is expensive,
Since there are many parts that require high-precision cutting, such as the terminal fixtures 81, the workability is not good, which has contributed to an increase in cost. In addition, since the knitted wire 84c of the shielded wire 84 is connected to the connecting member 87 by crimping, when the wire diameter of the shielded wire 84 changes, the connecting member 87 as well as the rubber packing 85 and the like must be exchanged, and the design is free. There was no degree.

An object of the present invention is to provide a shield structure of an electric wire which has a simple structure and is easy to assemble and can exert a shielding effect without using a shield wire.

[0011]

The above objects of the present invention are attained by an electric wire shield structure constituted as shown in the following (1) to (4). (1) inserted through the connecting wire, a tubular shield body which has been subjected to electrically conductive film on a surface, the connecting wires are inserted, and a fixing projection and a shield member for fixing locks the shield body on its outer surface An electric wire comprising: an inner body integrally provided with a locking member for pressing against the outer side surface; and an outer body for electrically connecting the shield body by surface-conductively contacting the inserted inner body. Shield structure.

(2) The connecting wire is inserted, the conductive shield is formed on the surface, and a cylindrical shield body made of a sheet material having a locking hole is inserted therethrough. An inner body integrally provided with a fixing projection for locking the stop hole and a locking member for pressing the shield body against the outer surface, and electrically connecting the shield body by conductively contacting the inserted inner body; An electric wire shield structure comprising an outer body.

(3) The wire shield structure according to (1) or (2), wherein a protruding contact portion that is long in the insertion direction is formed on a contact surface of the inner body with the outer body. .

(4) On the contact surface of the inner main body with the outer main body, a long projecting contact portion is formed in the insertion direction so that the inner main body can be elastically deformed according to the shape of the outer main body. The shield structure for an electric wire according to the above (1) or (2), wherein

[0015]

According to the electric wire shield structure of the present invention, the connection electric wire is electrically connected to a desired device in the inner main body and through the outer main body by inserting the inner main body into the outer main body. . The shield covering the connection wire is locked to the inner body and pressed against the outer surface of the inner body, so that it is electrically connected to a desired device through the inner body and the outer body that is in surface contact with the inner body. Is done. Therefore, the connection wires are covered and shielded by the shield body in the wiring section, and are shielded by the inner body and the outer body in the inner body and the outer body. Can be prevented.

Further, by providing the inner main body with a protruding contact portion for making close contact with the outer main body, or by adding elasticity to the inner main body, it is possible to improve the contact with the outer main body.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a first embodiment of a wire shield structure to which the present invention is applied will be described in detail with reference to FIGS.
FIG. 1 is an exploded perspective view showing a shield structure of an electric wire of the present invention,
FIG. 2 is a perspective view showing an assembled state in FIG. 1,
FIG. 3 is a perspective view showing an outer mounting structure in FIG.
FIG. 4 is a perspective view showing the inner structure in FIG.
FIG. 2 is a cross-sectional view of a main part showing an assembled state in FIG. 1.

The shield structure (hereinafter simply referred to as a shield structure) 1 of the electric wire according to the present embodiment has the same effect as the case where the shield wire is used without using the shield wire.
That is, when transmitting a high-frequency signal, oscillation is prevented, and a shielding effect such as preventing the influence of noise is exhibited. The shield structure 1 according to the present embodiment is composed of various members as shown in the drawings. That is, the cylindrical inner 11 is detachably inserted into an outer 41 attached to a desired electronic device such as a CPU box 45, and the inner 11 is connected to the electric wire 3 or the corrugated tube 4 to which the crimp terminal 2 is connected. Is fixed. Note that the corrugated tube 4 corresponds to the shield body in the present embodiment.

The corrugated tube 4 is integrally formed of a synthetic resin, and is formed in a flexible cylindrical shape as a whole. The cross-sectional shape in the longitudinal direction of the corrugated tube 4 is formed in a corrugated shape as shown in FIG. 5, and the entire outer surface and inner surface are plated with Cu and Ni. This corrugated tube 4 has wires 3
Is inserted, a shielding effect of −40 dB or more can be obtained in a frequency band of 500 Hz to 2 MHz. Further, one end of the corrugated tube 4 is mechanically fixed to an inner 11 to be described later, and is electrically connected so as to obtain a shielding effect by the plating.

Next, the inner 11 is fixed to two corrugated tube stoppers (hereinafter simply referred to as stoppers) 13 and 14 on the outer peripheral portion of the cylindrical inner main body 12 and further to the outer 41 when fixed. It comprises a lock member 15 to be used, a rubber packing 16 buried in the inner main body 12 and holding the electric wire 3 and the like. Also, the inner body 1
A partition 19 having an electric wire insertion hole 17 and a locking hole 18 for the rubber packing 16 is provided substantially at the center of the inside 2, and from the partition 19 toward the opening end as shown in FIGS. Two rod-shaped tape stoppers 20 are provided. As shown in FIG. 5, the tape stopper member 20 is used to wind the electric wire 3 with a vinyl tape 5 in order to prevent the electric wire 3 inserted through the electric wire insertion hole 17 from coming off.

The locking body 13 has hinge portions 21 provided at two locations on the outer periphery of the inner main body 12 and an engagement member formed in an arc shape so as to cover almost half of the entire circumference of the inner main body 12. The locking member 22 includes locking claws 23 provided at both ends of the locking member 22 and fixing grooves 24 formed on the inner peripheral surface of the locking member 22. Similarly, the locking body 14 includes hinge portions 25 provided at two locations around the outer periphery of the inner body 12.
A locking member 26 formed in an arc shape so as to cover substantially half of the entire circumference of the inner body 12, locking protrusions 27 provided at both ends of the locking member 26, And a fixing groove 28 formed on the inner peripheral surface.

The lock member 15 is configured to be elastically deformable by pushing the operation portion 15a, and is provided on a part of the outer surface with a locking projection 2 which is locked to the outer 41.
9 are formed. The locking member 22 rotates along the inner body 12 as shown by an arrow A in FIG. 1 with the hinge portion 21 as a fulcrum, and the locking member 26 uses an arrow B with the hinge portion 25 as a fulcrum. As shown, it is configured to rotate along the inner body 12. When the locking members 22 and 26 rotate as shown in FIG. 2, a fixing projection 31 is provided on the outer surface of the inner body 12 corresponding to the fixing grooves 24 and 28 formed on the respective inner peripheral surfaces. Have been.

The fixing projections 31 cooperate with the fixing grooves 24 and 28 to sandwich one end of the corrugated tube 4 and to fix the corrugated tube 4 to the outer surface of the inner main body 12 so as not to come off. The inner body 12 is integrally formed of a synthetic resin, and is plated with, for example, Ni so that the entire outer surface and the inner surface have conductivity. On the other hand, as for the corrugated tube 4 as well, since the entire outer surface and the inner surface are Ni-plated as described above, the corrugated tube 4 is pressed against the outer surface of the inner main body 12 so as to be sandwiched between the fixing protrusion 31 and the fixing grooves 24 and 28. By fixing with
The inner body 12 and the corrugated tube 4 are electrically connected.

The outer member 41 includes a double cylindrical outer body 42 and a lock member 1 provided on the inner body 12.
5 is formed so as to reciprocate in the longitudinal direction and to form a locking groove 43 for locking the locking projection 29.
As shown in FIG. 2, for example, a flange portion 46 for fixing to an electronic device such as a CPU box 45, and an O-ring 47 are provided. Note that the outer 41 is connected to the CPU box 45.
When attaching to the screw hole 4
As shown in FIG.

Next, the assembly of the shield structure 1 will be described. First, the rubber packing 16 is formed of an elastic body such as rubber and has three to four locking portions 16a.
The tip of the locking portion 16a is formed to have a large diameter in order to prevent the locking portion 16a from coming off.
9 into the locking hole 18 formed. As a result, FIG.
The rubber packing 16 is fitted into the electric wire insertion hole 18 as shown in FIG. Next, the electric wire 3 is inserted into the center hole of the rubber packing 16 from the rear end side of the inner body 12, that is, the end opening where the locking member 22 and the like are formed, by a predetermined length. The crimp terminal 2 is crimped to the tip of the electric wire 3, that is, the core wire 3b exposed from the coating 3a in advance.

In this state, the electric wire 3 and the tape stopper 20 are wound around with the vinyl tape 5. Although the vinyl tape 5 is shown as a single layer in FIG. 5 for convenience of illustration, the vinyl tape 5 is actually wound in a multiplex state so as not to come out even if the electric wire 3 is pulled. At this time, if the vinyl tape 5 is strongly wound, the tape fixing member 20 is deformed along the electric wire 3 to be more firmly integrated. Next, the corrugated tube 4 is pulled toward the rear end side of the inner main body 12, a part of the waveform that can be called an uneven portion is put on the fixed protrusion 31, and then the locking member 26 is rotated in the direction of arrow B, and the locking member is further rotated. 22
Is rotated in the direction of arrow A.

As a result, the fixing grooves 24 and 28 formed in the locking members 22 and 26 are in annular communication with each other, and one end of the corrugated tube 4 is fitted therein. Further, at the position where the fixing protrusion 31 is formed, the fixing protrusion 31 is sandwiched between the fixing grooves 24 and 28 and the corrugated tube 4 cannot be pulled out. In this state, as shown in FIG. 2, the rear end side of the inner main body 12 is annularly covered with locking members 22 and 26, and locking claws 23 provided at both ends of the locking member 22 are locked. It is locked by locking projections 27 provided at both ends of the member 26.

The inner 2 is assembled in this manner. In the assembled state shown in FIG.
As long as the locking between the locking projection 27 and the locking projection 27 is not released, the locking member 2
2,26 does not rise. Therefore, the corrugated tube 4 is pressed against the outer peripheral surface of the inner main body 12 in a wide range, and the corrugated tube 4 is mechanically incapable of being pulled out and electrically connected with low resistance to maintain conductivity with the inner main body 12. Will be done.

On the other hand, the outer 41 is provided with an O-ring 47 as shown in FIG.
Is fitted to the CPU box 45 as shown in FIG. Also, the inner 1 is attached to the outer 41.
1 is connected, as shown in FIG.
The electric wire 3 is inserted through the center hole of the inner body 2, and then the locking member 15 provided on the side surface of the inner main body 12 is pressed into the locking portion 44 provided on the side surface of the outer main body 42.

The inner body 12 includes a lock member 15
Is inserted into the outer main body 42 while being guided by being inserted into the locking portion 44. When the locking projection 29 provided on the lock member 15 is hooked on the connecting portion 43 a formed at the tip of the groove 43, the lock member 1 is locked.
5 is temporarily bent and deformed toward the center of the inner main body 12, and the locking projections 29 go under the connecting portions 43a to form the groove portions 4.
When it protrudes into 3, it returns to its original state due to its own elasticity. As a result, the connecting portion 43a is fitted between the locking projection 29 and the operation portion 15a, and the inner main body 12 is fixed to the outer main body 42.

Thus, the inner 11 and the outer 4
1 are fixed, but in this fixed state, the inner main body 12 and the outer main body 42 come into contact with a wide area as shown in FIG. Since the inner surface of the inner main body 12 and the outer surface of the outer main body 42 are Ni-plated as described above, the two become conductive. Also,
Since the corrugated tube 4 is also plated with Ni as described above, the corrugated tube 4 and the inner body 1
2. The outer body 42 is electrically connected, and further connected to the CPU box 45 via the flange portion 46 and screws. Since the CPU box 45 is connected to the short-circuit member GND as schematically shown in FIG. 3, the corrugated tube 4 is also connected to the outer main body 42 and the inner main body 12.
To be grounded.

Further, since the periphery of the electric wire 3 is covered with the corrugated tube 4, the electric current caused by the magnetic field and the like generated from the electric wire 3 is reduced by the corrugated tube 4 and the inner body 1.
2. The current flows to the short-circuit member GND via the outer body 42 and the CPU box 45, and the electric wire 3 is magnetically shielded. Therefore, the electric wire 3 can be reliably magnetically shielded without using a shielded wire that is expensive and requires a lot of wiring work, and material costs and man-hours can be greatly reduced. In addition, since the number of parts is small and the assembling is easy even in the entire shield structure 1, the production cost can be reduced.

Next, a second embodiment of the present invention will be described with reference to FIGS. The difference between the present embodiment and the first embodiment is that the configurations of the locking members 13 and 14 are changed, and therefore, members having the same operation are denoted by the same reference numerals. In the present embodiment, the locking members 51 and 52 are provided along the circumferential direction of the inner main body 12. That is, the locking body 51 includes an arc-shaped locking member 53, a hinge portion 54, and one locking claw 55. The locking body 52 includes an arc-shaped locking member 56, a hinge 57, and one locking claw 5.
8 is provided.

Although not shown in FIG. 6, the same locking projection as the locking projection 59 near the hinge portion 57 is provided near the hinge portion 54, and each of the locking members 53, 5 is provided.
6, the same fixing grooves 24, 2 as in the first embodiment.
8 are formed. In this embodiment, the locking member 5
Reference numerals 3 and 56 are configured to be wound around the outer surface of the inner main body 12, and positioning protrusions 61 are provided at appropriate intervals for positioning at the time of winding.

Next, the operation of fixing the electric wire 3 to the inner body 12 is performed in the same manner as in the first embodiment. And
When fixing the corrugated tube 4 to the inner main body 12, one end of the corrugated tube 4 is put on the fixing protrusion 31 provided at the end of the inner main body 12, as described above. When the locking members 53 and 56 are folded down along the inner body 12 in this state, the corrugated tube 4 is sandwiched between the fixing projection 31 and the grooves 24 and 28, and the inner body is similar to the first embodiment. 12 fixed.

That is, the inner 11 is assembled as shown in FIG. Since the entire outer peripheral surface of the inner body 12 as well as the corrugated tube 4 is plated with Ni, the corrugated tube 4 and the inner body 12 become conductive, and the inner 11 is connected to the outer 41 in the same manner as described above. Thus, the electric wire 3 is shielded by the same operation as described above.

Next, a third embodiment of the present invention will be described with reference to FIGS. The difference between this embodiment and the first embodiment lies in that a shield laminate sheet (hereinafter simply referred to as a sheet) is used instead of the corrugated tube 4, so that members having the same function are used. Are given the same reference numerals. As shown in FIG. 8, the sheet 61 is formed by laminating an aluminum foil having a thickness of, for example, about 10 μ on a flame-retardant PVC sheet (polyvinyl chloride sheet), and is formed into a cylindrical shape by bonding a joint 62. Things. When the seam 62 is bonded, that is, when the seam 62 is formed in a cylindrical shape, the entire inner surface is covered with the aluminum foil. In addition, a pair of locking holes 64 is formed at an end of the sheet 61 so as to be locked to a fixing protrusion 63 provided at a rear end of the inner main body 12 described later. Note that the sheet 61 corresponds to a shield body in this embodiment.

A fixing projection 63 is provided at the rear end of the inner body 12, that is, at the end where the sheet 61 is fitted, as shown in FIGS. 8 and 10
Although one fixing protrusion 63 is shown in FIG. 1, it is actually provided on the side surface opposite to the illustrated fixing protrusion 63 so that it can correspond to a pair of locking holes 64 formed in the seat 61. It has become. Except that the sheet 61 is locked to the fixing projection 63, the configurations and operations of the inner main body 12 and the outer main body 41 are the same as those in the first embodiment.

Next, when assembling the inner 11, the rubber packing 16 is inserted into the inner main body 12 in the same manner as described above.
And the electric wire 3 is inserted. Then, the sheet 61 is covered from the rear end side of the inner main body 12, and the pair of locking holes 64 is locked to the fixing protrusion 63. At this time, a part of the end of the sheet 61 is covered on the fixing protrusion 31 as described above. Next, as shown in FIG. 9, the locking members 22 and 26 are tilted in the same manner as described above, and the locking claw 23 is locked to the locking protrusion 27,
Assemble the inner 11. Next, the inner body 12
Into the outer main body 42 to lock the lock member 15 and the locking portion 44.

Next, as shown in FIG.
When the inner body 2 is inserted into the outer main body 42, the inner main body 12 is sandwiched between and contacts the double cylindrical body of the outer main body 42. Then, the pair of locking holes 64 of the sheet 61 are locked to the fixing protrusions 63 and further pressed by the locking members 22 and 26, so that they cannot come out of the fixing protrusions 63 and are pressed against the outer peripheral surface of the inner body 12. become. Therefore, also in this embodiment, the seat 61 is electrically connected to the CPU box 45 via the inner main body 12 and the outer main body 42, and the electric wires 3 are shielded as in the above-described embodiment.

As described above, in the electric wire shield structure to which the present invention is applied, no shield wire is required, a shielding effect of 40 dB or more is obtained, and the production cost and weight are reduced by about 50%. Could be reduced. In addition, since the diameter of the corrugated tube 4 and the sheet 61 is larger than the diameter of the electric wire 3, the diameter of the electric wire 3 is not limited, and a larger or smaller diameter electric wire can be used. I do. Further, since the electric wire 3 is protected by the corrugated tube 4 and the sheet 61, the safety of the device is improved. Furthermore, the connection work of the electric wire 3 can be performed safely and easily, and the workability can be improved.

Next, a fourth embodiment of the present invention will be described in detail with reference to FIGS. The difference between this embodiment and each of the above embodiments relates to a configuration for increasing the contact between the inner body and the outer body, and members having the same function are denoted by the same reference numerals. . That is, as shown in FIG. 12 and FIG.
The protruding contact portions 71 are formed along the longitudinal direction of the inner main body 12, in other words, along the insertion direction into the outer main body 42. When the protruding contact portion 71 is formed, the thickness of the inner main body 12 is partially increased, but the thickness is the gap between the inner cylindrical portion 42a and the outer cylindrical portion 42b of the outer main body 42 shown in FIG. It is set within a range that can be inserted densely within d.

Next, as shown in FIG.
2 into the outer main body 42,
Is in close contact with the outer surface of the inner cylindrical portion 42a, and the electrical connection is improved. Therefore, the corrugated tube 4 or the sheet 61 is connected to the CPU box 45 with lower resistance, and the shielding effect is improved. Further, since the protruding contact portion 71 is not a protrusion but a trapezoid formed so as to be long in the insertion direction, the N
The danger of peeling off the i-plate is reduced, and poor electrical contact can be reduced. That is, when the Ni plating is peeled off, the corrugated tube 4 or the sheet 61 is not brought into contact with the CPU box 45, and the shielding effect is impaired. However, according to the configuration of the present embodiment, such an accident can be prevented.

The inner body 12 may be configured as shown in FIG. 15 in order to improve the contact between the protruding contact portion 71 and the inner cylindrical portion 42a. That is, the inner main body 12 is integrally formed in advance into a slightly elliptical shape using a synthetic resin. However, since the inner body 12 is inserted into the gap d between the inner cylinder part 42a and the outer cylinder part 42b, the gap d
It is an elliptical shape that can be inserted inside.

According to this configuration, when the inner main body 12 is inserted into the gap d, the inner main body 12 is deformed into a circular shape along the shape of the inner cylindrical portion 42a as shown by a solid line in FIG. However, since the inner main body 12 attempts to return to the elliptical shape, the protruding contact portion 71 always presses against the inner cylindrical portion 42a, and the contact between the inner main body 12 and the inner cylindrical portion 42a is improved. As a result, the contact resistance between the inner main body 12 and the outer main body 42 is reduced, and the shielding effect is further ensured.

Further, as shown in FIG.
2 may be formed so as to facilitate deformation of the inner main body 12 by improving the elastic force. According to this configuration, before insertion into the gap d,
As shown by the imaginary line in FIG.
By inserting into the gap d, it is deformed as shown by the solid line,
The contact with the inner cylinder portion 42a becomes dense, and the same effect as described above is obtained. Further, by forming the bending portion 72, the deformation when the inner main body 12 is inserted becomes easy, and the insertion can be performed smoothly.

[0047]

As described above, the shield structure of the electric wire according to the present invention has a structure in which the connection wire is inserted into the cylindrical shield body provided with the conductive film, and the shield body is inserted through the connection wire. Is inserted into the outer main body in a state where the outer main body is electrically conductively locked to the outer side surface of the inner main body and cannot be pulled out. Therefore, since the outer surfaces of the inner main body and the outer main body are plated so as to be conductive, the shield body is connected to the device via the inner main body and the outer main body to shield the electric wires.

Therefore, the electric wire is covered by the shield body in the wiring section, and is shielded by the inner body or the outer body in the section through which the inner body and the outer body are inserted. The same shielding effect as when a shielded wire is used can be obtained without using a complicated shielded wire. Further, the structure is simple, the assembling work is easy, the shield wire is unnecessary, and the cost can be reduced in combination with the simple wiring processing.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a first embodiment of an electric wire shield structure of the present invention.

FIG. 2 is a perspective view showing an assembled state of the shield structure in FIG. 1;

FIG. 3 is a perspective view showing an assembled state of the outer in FIG. 1 to an electronic device.

FIG. 4 is a perspective view showing a configuration of an inner main body in FIG.

FIG. 5 is a cross-sectional view of a main part showing a state where assembly of the shield structure in FIG. 1 is completed.

FIG. 6 is a perspective view of an inner body showing a second embodiment of the electric wire shield structure of the present invention.

FIG. 7 is a perspective view showing an assembled state of the shield structure in FIG. 6;

FIG. 8 is an exploded perspective view showing a third embodiment of the electric wire shield structure of the present invention.

9 is a perspective view showing an assembled state of the shield structure in FIG. 8;

FIG. 10 is a perspective view showing a configuration of an inner main body in FIG.

11 is a cross-sectional view of a main part showing a connection state between an inner and an outer in FIG.

FIG. 12 is a perspective view of an inner body showing a fourth embodiment of the electric wire shield structure of the present invention.

FIG. 13 is a perspective view showing a configuration of an outer main body in FIG.

FIG. 14 is a cross-sectional view showing a connection state between the inner main body and the outer main body in FIG.

FIG. 15 is a schematic sectional view showing another example of the configuration of the inner main body in FIG.

FIG. 16 is a schematic cross-sectional view showing yet another configuration example of the inner main body in FIG.

FIG. 17 is a sectional view showing an example of a conventional shield structure.

FIG. 18 is a sectional view showing an assembled state of the shield structure in FIG. 17;

19 is a cross-sectional view showing a state where assembly of the shield structure in FIG. 17 is completed.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Electric wire shield structure 2 Crimp terminal 3 Electric wire 4 Corrugated tube (shield body) 11 Inner 12 Inner body 13, 14 Corrugated tube stopper 15 Lock member 16 Rubber packing 17 Electric wire insertion hole 18 Lock hole 19 Partition 20 Tape stopper 21, 25 hinge part 22, 26 locking member 23 locking claw 24, 28 fixing groove 27, 29 locking protrusion 31 fixing protrusion 41 outer 42 outer body 43 locking groove 44 locking part 45 CPU box 46 flange part 47 O Rings 53, 56 Locking member 59 Locking protrusion 61 Shield laminate sheet (Shield body) 62 Seam 63 Fixing protrusion 64 Locking hole 71 Projecting contact portion 72 Flexing portion

──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Tomohiro Ikeda 2464-48 Yazaki Parts Co., Ltd. 72) Inventor Masayuki Sato 2464-48 Yazuzu, Kosai-shi, Shizuoka Pref. Yazaki Parts Co., Ltd. (56) References JP-A-8-70521 (JP, A) JP-A 62-55398 (JP, U) JP-A 61-141916 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) H05K 9/00

Claims (4)

(57) [Claims] Claims: 1. A connecting wire is inserted and a conductive film is coated on the surface.
And a fixing member that allows the electric wire to pass therethrough, and that locks and fixes the shield body on the outer surface thereof and a locking member that presses the shield body against the outer surface. A shield structure for an electric wire, comprising: an inner body; and an outer body that is in conductive contact with the inserted inner body and electrically connects the shield body. 2. A cylindrical shield body made of a sheet material having a conductive film formed on its surface and having a locking hole formed therein, through which a connecting wire is inserted, and wherein said wire is inserted through an outer surface thereof. An inner main body integrally provided with a fixing projection that locks in the stop hole and a locking member that presses the shield body against the outer surface;
An electric wire shield structure, comprising: an outer body that electrically connects the shield body by surface-conductively contacting the inserted inner body. 3. The shield structure for an electric wire according to claim 1, wherein a projecting contact portion that is long in the insertion direction is formed on a contact surface of the inner body with the outer body. 4. A projecting contact portion that is long in the insertion direction is formed on a contact surface of the inner main body with the outer main body, and the inner main body is elastically deformable according to the shape of the outer main body. The shield structure for an electric wire according to claim 1 or 2, wherein: